GPM stands for Gran Premio delle Montagne, or Italian King of the Mountains. Because wearing the polka dot jersey might be a bit presumptuous, the Castelli GPM Jersey comes in five gorgeous solid colors. It isn’t Castelli’s lightest jersey, but the comfort of the seamless arm bands and collar makes it ideal for long, arduous climbs. With understated looks and innovative details, this cycling jersey is a classic.

• Stratus fabric with Prosecco treatment
• Seamless, microfiber collar and arm bands
• Full length locking zipper
• 3 back pockets and zippered key pocket
• Reflective tabs on back